Measurement characteristics of the childhood Asthma-Control Test and a shortened, child-only version
Gerald, Joe K
Wei, Christine Y
Holbrook, Janet T
Teague, William G
Wise, Robert A
Gerald, Lynn B
AffiliationUniv Arizona, Sch Med, Arizona Resp Ctr, Div Pulm Crit Care Allergy & Sleep Med,Dept Med
Univ Arizona, Dept Hlth Promot Sci, Arizona Resp Ctr, Mel & Enid Zuckerman Coll Publ Hlth
MetadataShow full item record
PublisherNATURE PUBLISHING GROUP
CitationMeasurement characteristics of the childhood Asthma-Control Test and a shortened, child-only version 2016, 26:16075 npj Primary Care Respiratory Medicine
Rights© The Author(s) 2016. This work is licensed under a Creative Commons Attribution 4.0 International License.
Collection InformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at firstname.lastname@example.org.
AbstractThe childhood Asthma-Control Test (C-ACT) is validated for assessing asthma control in paediatric asthma. Among children aged 4-11 years, the C-ACT requires the simultaneous presence of both parent and child. There is an unmet need for a tool that can be used to assess asthma control in children when parents or caregivers are not present such as in the school setting. We assessed the psychometric properties and estimated the minimally important difference (MID) of the C-ACT and a modified version, comprising only the child responses (C-ACTc). Asthma patients aged 6-11 years (n = 161) from a previously completed multicenter randomised trial were included. Demographic information, spirometry and questionnaire scores were obtained at baseline and during follow-up. Participants or their guardians kept a daily asthma diary. Internal consistency reliabilities of the C-ACT and C-ACTc were 0.76 and 0.67 (Cronbach's a), respectively. Test-retest reliabilities of the C-ACT and C-ACTc were 0.72 and 0.66 (intra-class correlation), respectively. Significant correlations were noted between C-ACT scores and ACQ scores (Spearman's correlation r = -0.56, 95% CI (-0.66, -0.44), P<0.001). The strength of the correlation between C-ACTc scores and ACQ scores was weaker (Spearman's correlation r = -0.46, 95% CI (-0.58, -0.33), P<0.001). We estimated the MID for the C-ACT and C-ACTc to be 2 points and 1 point, respectively. Among asthma patients aged 6-11 years, the C-ACT had good psychometric properties. The psychometric properties of a shortened child-only version (C-ACTc), although acceptable, are not as strong.
VersionFinal published version
SponsorsAmerican Lung Association (ALA); National Heart Lung and Blood Institutes (NHLBI)
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